/**
 * @description: axios封装，请求和响应拦截器
 * @Author: huangpeng
 * @Date: 2023年05月14日 17:11
 * @Copyright:  2022-2023
 */
import axios from 'axios'
import {Notification, MessageBox, Message, Loading} from 'element-ui'
import store from '@/store'
import {getToken, getUsername, removeToken, removeUserId, removeUsername} from "@/utils/auth";
import errorCode from '@/utils/errorCode'
import {tansParams, blobValidate} from "@/utils/lemon";
import cache from '@/plugins/cache'
import {saveAs} from 'file-saver'

let downloadLoadingInstance;
// 是否显示重新登录
export let isReLogin = {show: false};
axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'

/** 创建axios实例 */
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 10000
})

/** 请求拦截器 */
service.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
    config.headers['username'] = encodeURIComponent(getUsername());
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                  // 请求地址
      const s_data = sessionObj.data;                // 请求数据
      const s_time = sessionObj.time;                // 请求时间
      const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
  Promise.reject(error)
})

/** 响应拦截器 */
service.interceptors.response.use(res => {
  // 未设置状态码则默认成功状态
  const code = res.data.code || 200;
  // 获取错误信息
  const msg = errorCode[code] || res.data.msg || errorCode['default']
  // 二进制数据则直接返回
  if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
    return res.data
  }
  if (code === 401) {
    if (!isReLogin.show) {
      isReLogin.show = true;
      MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或重新登录', '系统提示', {
        confirmButtonText: '重新登录',
        cancelButtonText: '取消',
        type: 'warning'
      }
      ).then(() => {
		    isReLogin.show = false;
		    store.dispatch('LogOut').then(() => {
		      location.href = '/login';
		    })
			}).catch(() => {
	      isReLogin.show = false;
			});
    } else {
	    removeToken();
	    removeUserId();
	    removeUsername();
	    MessageBox.confirm('无效的会话，或者会话已过期，您可以留在首页，或者重新登录', '系统提示', {
			    confirmButtonText: '重新登录',
			    cancelButtonText: '留在首页',
			    type: 'warning'
		    }
	    ).then(() => {
		    location.href = '/login';
	    }).catch(() => {
		    location.href = '/index';
	    });
    }
    return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
  } else if (code === 500) {
    Message({
      message: msg,
      type: 'error'
    })
    return Promise.reject(new Error(msg))
  } else if (code !== 200) {
    Notification.error({
      title: msg
    })
    return Promise.reject('error')
  } else {
    return res.data
  }
    },
    error => {
  let {message} = error;
  if (message === "Network Error") {
    message = "后端接口连接异常";
  } else if (message.includes("timeout")) {
    message = "系统接口请求超时";
  } else if (message.includes("Request failed with status code")) {
    message = "系统接口" + message.substr(message.length - 3) + "异常";
  }
  Message({
    message: message,
    type: 'error',
    duration: 5 * 1000
  })
  return Promise.reject(error)
})

// 通用下载方法
export function download(url, params, filename) {
  downloadLoadingInstance = Loading.service({
    text: "正在下载数据，请稍候",
    spinner: "el-icon-loading",
    background: "rgba(0, 0, 0, 0.7)",
  })
  return service.post(url, params, {
    transformRequest: [(params) => {
      return tansParams(params)
    }],
    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
    responseType: 'blob'
  }).then(async (data) => {
    const isLogin = await blobValidate(data);
    if (isLogin) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

export default service
